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An object moving at speed 40cm/sec towards a concave mirror of focal kenght 20cm.When the object is at distance 60cm,the speed of image is
Differentiating the expression w.r.t. time Just find the final position of the image by using the mirror formula... Solving we getv = – 30 cm Now using this formula we get So the velocity of the image is 10 cm/sec opposite to the direction of the velocity of object. Piyush Kumar BeheraIIT Dhanbad
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